Extension of the Isobaric Nucleon Model for Pion Production in Pion-Nucleon and Nucleon-Nucleon Collisions

1960 ◽  
Vol 5 (1) ◽  
pp. 24-26 ◽  
Author(s):  
S. J. Lindenbaum ◽  
R. M. Sternheimer
Keyword(s):  
Pion Production ◽  
Nucleon Nucleon ◽  
Pion Nucleon

A resonance model for pion production in nucleon-nucleon collisions at fairly low energies

1958 ◽  
Vol 244 (1239) ◽  
pp. 491-523 ◽  
Keyword(s):  
Angular Momentum ◽  
Cross Sections ◽  
Pion Production ◽  
Neutral Pion ◽  
Mass Difference ◽  
Nucleon Nucleon ◽  
Resonance Model ◽  
Low Energies ◽  
Pion Nucleon ◽  
The Difference

Cross-sections for pion production in nucleon-nucleon collisions are calculated on the assumption that the production takes place into a few angular momentum states only, and that the matrix element for each particular transition is constant except for factors due to the final-state pion-nucleon and nucleon-nucleon interactions. The outgoing pion is assumed to be in a resonant (3/2, 3/2) state with one of the nucleons. The angular momentum states introduced are compared with those of Rosenfeld (1954) and Gell-Mann & Watson (1954). It is found that a three-parameter theory can give a good account of most of the experiments on pion production, both total and differential, up to 660 MeV, except near threshold when non-resonance production is important and further parameters are necessary. Energy distribution and angular correlation experiments bring out the importance of the pion-nucleon resonance. The cross-section for neutral pion production is predicted fairly accurately in terms of that for positive pion production from threshold to 660 MeV; at 660 MeV, the calculated positive:neutral ratio is 3⋅9. The difference between this value and that of Peaslee (1954) is partly due to the mass difference between the positive and neutral pion and partly to the inclusion of interference effects between the outgoing nucleons.

scholarly journals Nucleon-nucleon interaction from pion-nucleon phase shift analysis

1973 ◽  
Vol 44 (1) ◽  
pp. 1-4 ◽  
Author(s):  
R. Vinh Mau ◽  
J.M. Richard ◽  
B. Loiseau ◽  
M. Lacombe ◽  
W.N. Cottingham
Keyword(s):  
Phase Shift ◽  
Nucleon Nucleon ◽  
Phase Shift Analysis ◽  
Nucleon Interaction ◽  
Shift Analysis ◽  
Pion Nucleon ◽  
Nucleon Nucleon Interaction

A study of single pion production in nucleon-nucleon collisions

1981 ◽  
Vol 356 (2) ◽  
pp. 345-364 ◽  
Author(s):  
A. König ◽  
P. Kroll
Keyword(s):  
Pion Production ◽  
Nucleon Nucleon

Exclusive spin-dependent pion production in medium-energy nucleon-nucleon collisions: The role of unitarity

1981 ◽  
Vol 106 (1-2) ◽  
pp. 29-32 ◽  
Author(s):  
J. Dubach ◽  
W.M. Kloet ◽  
A. Cass ◽  
R.R. Silbar
Keyword(s):  
Pion Production ◽  
Nucleon Nucleon ◽  
Medium Energy

PIONIC FUSION AT SUBTHRESHOLD ENERGIES

2009 ◽  
Vol 24 (02n03) ◽  
pp. 539-543
Author(s):  
L. JOULAEIZADEH ◽  
J. BACELAR ◽  
M. ESLAMI-KALANTARI ◽  
I. GAŠPARIĆ ◽  
N. KALANTAR-NAYESTANAKI ◽  
...  
Keyword(s):  
Cross Sections ◽  
Pion Production ◽  
Detection System ◽  
Nucleon Nucleon ◽  
Accelerator Facility ◽  
Production Threshold ◽  
Neutral Pions ◽  
Pion Production Threshold ◽  
Plastic Ball ◽  
Large Acceptance

In order to study the role of pions and clustering phenomena in nuclei, two experiments have been performed using the AGOR accelerator facility. In collisions of two nuclei a pion and a fused nucleus were produced. The examined reactions were 4He(3He, π0)7Be and 6Li(4He, π0)10B at beam energies about 10 MeV above the coherent pion production threshold (256 MeV and 236.4 MeV, respectively). Since the available energy is well below the pion production threshold in an elementary nucleon-nucleon process, a highly coherent mechanism is needed. We identified the reaction by measuring the fused system in the magnetic spectrometer and the produced neutral pions in the Plastic Ball detection system with large acceptance. Our experimental setup provided the exclusive cross sections by identifying all products in overdetermined kinematics. Here we present the preliminary results of the analysis for the second reaction. Angular distribution of neutral pions will be discussed.

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